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Documentation Number 3PCISD4x-3903 Manual Chapter 4 33
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Chapter 4: TROUBLESHOOTING
If you have any trouble starting your system after installing the card,
the card may not be properly seated in the slot. Remove and re-
insert it or try a different slot.
If you are unable to communicate with the card using your software
and hardware devices:
1. Check your pinouts. In RS-422 or RS-485 mode the "A" lines
should match your "A" or "−" lines. "B" lines should match your
"B" or "+" lines. Note: RS-422/485 pinouts are non-standard.
2. Use the COMTest program provided on the PCI/USB Port Utility
Disk with a loop back to check the card. Run Setup.exe to install
COMTest on your program menu under B&B Electronics.
A Loopback connection for RS-232 connects the Transmit
output to the Receive input. (pins #2 & #3 on the DB9
connector) For RS-422 or 4-wire RS-485, connect the TD(A) to
RD(A) and the TD(B) to RD(B). Then use the COMTest program
to send characters, and observe the characters being received.
To check 2-wire RS-485, you will need to enable the receiver by
moving the receive jumper to 422 mode, or use one Port to
transmit to another by cross connecting and loading COMTest
twice, one copy for each port. Characters typed in one copy of
COMTest will appear in the receive window of the other. Note
that software must ignore the RS-232 handshaking lines in RS-
422/RS-485 mode, the input lines (CTS, DSR, DCD, RI) are not
pulled high.
3. Try another software package for troubleshooting.
4. Check our website for available FAQ's or troubleshooting hints.
5. Call B&B Electronics Technical Support for troubleshooting
assistance.
International Office
Technicians are available at (815) 433-5100 to answer your
questions from 8 AM - 5 PM weekdays (Central Time).
European Office
Technicians are available at +353 91-792444 to answer your
questions from 8:30 AM – 5 PM weekdays (GMT Time).
34 Chapter 4 Documentation Number 3PCISD4x-3903 Manual
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445